Volvo 850 - M56H gearbox
The sound is at the start, and around the 6 second mark. It's not very clear over the road noise unfortunately.
When downshifting, I get this noise as I engage the clutch (lift off the clutch pedal). More specifically, it's when the clutch is spinning faster than the flywheel (not properly rev matched). I'm wondering if it's just clutch noise, and hopefully, not something worse.